Directs: (1) the U.S. Trade Representative to certify to Congress by August 31, 2006, that Japan is no longer prohibiting the importation of U.S. beef; (2) the Secretary of the Treasury, if such certification is not made, to impose additional tariffs (which shall continue until the certification is submitted to Congress) on Japan by September 30, 2006; and (3) the Secretary of Agriculture to begin negotiations with Japan to end such beef import prohibitions.